CbrAB-dependent regulation of pcnB, a poly(A) polymerase gene involved in polyadenylation of RNA in Pseudomonas fluorescens

13Citations
Citations of this article
14Readers
Mendeley users who have this article in their library.

Abstract

CbrB is a global σ 54-dependent regulator required for nutrient acquisition in Pseudomonas. Located downstream of cbrB on the Pseudomonas fluorescens SBW25 chromosome is pcnB, a putative poly(A) polymerase gene. Presence of a σ 54 promoter in the intergenic region of cbrB and pcnB led to the hypothesis that CbrB regulates pcnB expression in a σ 54- dependent manner. Here we show that transcription of pcnB is CbrB dependent. However, 5′-RACE analysis of the pcnB transcript using primers located in the pcnB coding region shows that transcription starts immediately upstream of the putative ATG site at a σ 70-like promoter. Deletion of pcnB caused ~80% decrease of ployadenylated 23S rRNA; growth of the pcnB mutant was compromised in a range of labora torymedia and on sugar beet seedlings. Further 5′-RACE analysis confirmed the existence of the predi cted σ 54 promoter. Genetic analysis showed that the σ 54 promoter drives expression of crcZ, a homologue of the recently described small RNA from Pseudomonas aeruginosa, in a CbrB-dependent manner. Taken together, our data show that both pcnB and crcZ are part of the CbrB regulon. Moreover, the data draw further attention to the central regulatory role of CbrB and provides a link between mRNA degradation and cellular catabolism. © 2010 Society for Applied Microbiology and Blackwell Publishing Ltd.

References Powered by Scopus

Engineering hybrid genes without the use of restriction enzymes: gene splicing by overlap extension

2784Citations
N/AReaders
Get full text

Broad host range DNA cloning system for Gram-negative bacteria: Construction of a gene bank of Rhizobium meliloti

1960Citations
N/AReaders
Get full text

The bacterial enhancer-dependent σ<sup>54</sup> (σ(N)) transcription factor

367Citations
N/AReaders
Get full text

Cited by Powered by Scopus

The Pseudomonas aeruginosa opportunistic pathogen and human infections

244Citations
N/AReaders
Get full text

Small RNAs as regulators of primary and secondary metabolism in Pseudomonas species

126Citations
N/AReaders
Get full text

Rewiring two-component signal transduction with small RNAs

36Citations
N/AReaders
Get full text

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Cite

CITATION STYLE

APA

Zhang, X. X., Liu, Y. H., & Rainey, P. B. (2010). CbrAB-dependent regulation of pcnB, a poly(A) polymerase gene involved in polyadenylation of RNA in Pseudomonas fluorescens. Environmental Microbiology, 12(6), 1674–1683. https://doi.org/10.1111/j.1462-2920.2010.02228.x

Readers' Seniority

Tooltip

PhD / Post grad / Masters / Doc 7

64%

Researcher 3

27%

Lecturer / Post doc 1

9%

Readers' Discipline

Tooltip

Agricultural and Biological Sciences 6

60%

Biochemistry, Genetics and Molecular Bi... 4

40%

Save time finding and organizing research with Mendeley

Sign up for free